The NTSB’s decision to open a formal investigation into a December 2023 bird strike involving a Southwest Airlines Boeing 737 MAX 8 will add scrutiny to the rarely needed safety device triggered during the incident that some FAA experts and pilots believe creates unacceptable risk.

The FAA evaluated bird strike concerns on Boeing 737 MAX engines, opting not to require immediate action. The review board found no urgent issue, though further assessments and procedure amendments are being considered.

The FAA is weighing new takeoff instructions for Boeing 737 MAX pilots to avoid a risk of smoke in the cabin or flight deck if an engine is hit by a bird.

FAA Corrective Action Review Board reviewed the CFM LEAP-1B engine bird strikes which led to smoke entering two Boeing 737 MAX aircraft

The Federal Aviation Administration won't require any immediate action after assembling a review board to weigh concerns about Boeing ( NYSE: BA) 737 Max engines after two bird strikes on Southwest Airlines ( LUV) planes in 2023, the agency said Tuesday.

FAA to review Boeing 737 MAX engine safety after bird strikes; potential delays in MAX 7, MAX 10 certifications

The FAA Corrective Action Review Board, after reviewing the CFM LEAP-1B engine bird strikes, which eventually led to smoke entering the aircrafts, said that the issue does not warrant an immediate action. The agency will therefore follow standard regulatory processes to address them, Reuters reported.

A technical review by the FAA decided the risk from an engine vulnerability does not warrant immediate action, contrary to an internal report last month.